Umpire Books
Besides the Official Baseball Rules there are a lot of interesting books. Here you can find some of them:
PBUC Umpire Manual – Dusty Dellinger, Larry Reveal and Andy Shultz (2011)
MLB Umpire Manual – Office of the Commissioner of Baseball (2002 - 2011)
You're the Umpire: 139 Scenarios to Test Your Baseball Knowledge – Wayne Stewart (2010)
As They See 'Em: A Fan's Travels in the Land of Umpires – Bruce Weber (2010)
Planet of the Umps: A Baseball Life from Behind the Plate – Ken Kaiser and David Fisher (2004)
The Umpire Strikes Back – Ron Luciano (with David Fisher) (1984)
Strike Two – Ron Luciano (with David Fisher) (1985)
The Fall of the Roman Umpire – Ron Luciano (1987)
Remembrance of Swings Past – Ron Luciano and David Fisher (1989)
Baseball Lite – Ron Luciano (1990)
The Men in Blue: Conversations with Umpires (Bison Book) – Larry R. Gerlach (1994)
The Humorous Side of Major League Baseball: An Umpire's Look Back at Bizarre Plays, Baseball Humor, Brawls, Ejections, Funny Stories, Knotty Problems, Tough Calls and More – Steve Boga (2010)
Watching Baseball Smarter: A Professional Fan's Guide for Beginners, Semi-experts, and Deeply Serious Geeks – Zack Hample (2007)
Baseball Umpires Encyclopedia – Carl Childress (2011)
The Hidden Language of Baseball – Paul Dickson (2005)
The Unwritten Rules of Baseball: The Etiquette, Conventional Wisdom, and Axiomatic Codes of Our National Pastime – Paul Dickson (2009)
The Baseball Codes: Beanballs, Sign Stealing, and Bench-Clearing Brawls: The Unwritten Rules of America's Pastime – Jason Turbow and Michael Duca (2011)
Life Behind the Mask: Memoir of a Youth Baseball Umpire – Michael Schafer (2011)
Everything Happens in Chillicothe: A Summer in the Frontier League With Max McLeary, the One-Eyed Umpire – Mike Shannon (2003)
Never Blame the Umpire – Gene Fehler (2011)
The Umpire's Handbook: Revised Edition – J. Brinkman and Euchner (1995)
How to Umpire Baseball and Softball: An Introduction to Basic Umpiring Skills – Steve Boga (2011)
Baseball Field Guide: An In-Depth Illustrated Guide to the Complete Rules of Baseball – Dan Formosa and Paul Hamburger (2008)
You're Out and You're Ugly, Too!: Confessions Of An Umpire With An Attitude – Durwood Merrill, Jim Dent and Ken Griffey (1999)
Center Field on Fire: An Umpire's Life with Pine tar Bats, Spitballs, and Corked Personalities – Dave Phillips, Rob Rains and Bob Costas (2004)
The Best Seat in Baseball, But You Have to Stand: The Game as Umpires See It (Writing Baseball) – Professor Lee Gutkind and Eric Rolfe Greenberg (1999)
Dean Of Umpires: A Biography Of Bill Mcgowan, 1896-1954 – Bob Luke and Jim Evans (2005)
Major League Umpires' Performance, 2007-2010: A Comprehensive Statistical Review – Andrew Goldblatt (2011)
You've Got to Have Balls to Make It in This League: My Life as an Umpire – Pam Postema and Gene Wojciechowski (2003)
Strrr-ike!! My First Biography: Emmett Ashford, Baseball Umpire – Adrienne Cherie Ashford (2004)
Behind the Mask: My Double Life in Baseball – Dave Pallone (1991)
Working the Plate: The Eric Gregg Story – Eric Gregg (1990)
Kill the Umpire: The Calls of Ed Gorgon – Jon L. Breen (2003)
Standing the Gaff: The Life and Hard Times of a Minor League Umpire – Harry Johnson (1994)
Please don’t kill the Umpire! – John Massaro (1999)
More Than 100 Problems with the Official Baseball Rules – Rick Roder
Baseball Rules in Plain English – Jim Booth (2002)
Baseball Umpires Guidebook, Volume I “Mechanics for a crew of two umpires” – Mark Ambrosius (2000)
Smart Baseball Umpiring – George Demetiou
Base Work: Mechanics for Two-Umpire Baseball Crews – Jeffery Stern (2004)
Plate Work: Mechanics for Two-Umpire Baseball Crews – Jeffery Stern (2004)